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. 2012 Apr 3;39(4):2290–2302. doi: 10.1118/1.3697523

Figure 2.

Figure 2

Two-dimensional illustration showing a cross-section of the phantom interior volume V, the outline S, and the exterior (air) A. B1–B5 represent various types of subvolumes, which are assigned to different tissue types during the recursive partitioning.